https://bz.apache.org/bugzilla/show_bug.cgi?id=63223
Bug ID: 63223
Summary: org.apache.coyote.http2.Http2UpgradeHandler.pruneClose
dStreams
Product: Tomcat 9
Version: 9.0.14
Hardware: PC
OS: Linux
Status: NEW
Severity: blocker
Priority: P2
Component: Catalina
Assignee: dev@tomcat.apache.org
Reporter: u...@kantzuker.com
Target Milestone: -----
We have a blocking potential bug occurring on our web server,
Once in a while the server get into blocking state not accepting new
connections.
The logs are showing the following errors every few milliseconds:
19-Feb-2019 06:09:10.455 WARNING [https-openssl-apr-8443-exec-435]
org.apache.coyote.http2.Http2UpgradeHandler.pruneClosedStreams Connection
[3442] Failed to fully prune the connection because streams were active / used
in the priority tree. There are [7] too many streams
19-Feb-2019 06:09:10.455 WARNING [https-openssl-apr-8443-exec-435]
org.apache.coyote.http2.Http2UpgradeHandler.pruneClosedStreams Connection
[3442] Failed to fully prune the connection because streams were active / used
in the priority tree. There are [7] too many streams
19-Feb-2019 06:09:10.456 WARNING [https-openssl-apr-8443-exec-435]
org.apache.coyote.http2.Http2UpgradeHandler.pruneClosedStreams Connection
[3442] Failed to fully prune the connection because streams were active / used
in the priority tree. There are [7] too many streams
19-Feb-2019 06:09:10.457 WARNING [https-openssl-apr-8443-exec-435]
org.apache.coyote.http2.Http2UpgradeHandler.pruneClosedStreams Connection
[3442] Failed to fully prune the connection because streams were active / used
in the priority tree. There are [7] too many streams
19-Feb-2019 06:09:10.457 WARNING [https-openssl-apr-8443-exec-435]
org.apache.coyote.http2.Http2UpgradeHandler.pruneClosedStreams Connection
[3442] Failed to fully prune the connection because streams were active / used
in the priority tree. There are [7] too many streams
It may stuck in this state for a random of time in minutes, once it was stuck
like that for over an hour. when I restarted the server the errors disappeared.
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